宽频带内的多速率空间信号能量积累和检测  

An Energy Integration and Detection Method of Space Signal with Multi-rate in Wide Band

作　　者：吴兆平 同钊 雷文英[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2017年第6期20-25,共6页Space Electronic Technology

摘　　要：为有效侦察具有多速率和所在频谱宽的卫星星间链路信号,提出了一种信号能量积累和检测方法。该方法首先对信道特性进行学习,并根据学习结果对消环境中的杂波和干扰,其次对宽范围频谱进行信道化处理并将每个信道内的数据转换到频域,之后对信号能量进行两种形式的非相干积累,最后在带宽匹配的基础上进行信号检测。所提方法通过非相干积累和带宽匹配的方法提高了该类信号能量积累效率,仿真和实测结果显示,所提方法能有效检测低信噪比下不同速率的空间信号。In order to reconnoiter the signal of inter-satellite link with multi-rate and wide frequency band,a method of signal energy integration and detection is proposed in this paper. Firstly,channel properties are studied and clutter cancellation and spikes elimination is implemented with by the studied results. Then,the wide band is channelized and the signal in each channel is changed into frequency domain. After that,signal energy is integrated in two non-coherent ways. At last,signal detection is performed on the base of band matched. The proposed method improves the energy integration efficiency of this space signal by non-coherent integration and band matching. The results of simulation and real-data test manifests that the proposed method can effectively detect the space signal with low SNR and different rates.

关 键 词：多速率 空间信号 能量积累 信号检测 

分 类 号：V474[航空宇航科学与技术—飞行器设计]